A free, open source cross-platform flight simulator developed by the FlightGear project since 1997.
An open-source, cross-platform game engine designed for everyone - it's extensible, fast and easy to learn.
A cross-platform video game similar to the Mario Kart series. The game features the mascots of several open source projects.
A 2D and 3D, cross-platform, free and open-source game engine released under the MIT license.
A free, open-source, historical Real Time Strategy (RTS) game currently under development by Wildfire Games. As the leader of an ancient civilization, you must gather the resources you need to raise a military force and dominate your enemies.
Alpha 26 - Zhuangzi
A fast-paced, futuristic FPS with RTS elements, pitting technologically advanced humans against hordes of highly adaptable aliens.
An open-source re-implementation of RollerCoaster Tycoon 2 (RCT2), expanding the game with new features, fixing bugs and raising game limits.
Speed Dreams is a Motorsport Simulator featuring high-quality 3D graphics and an accurate physics engine that aims to represent realism driving.